 alz.org or call the helpline 800-272-3900 a heat advisory starts at noon today and lasts until 8 p.m this evening ahead of a front hot and humid with a partly to mostly cloudy sky behind your 94 the heat index into the triple digits out ahead of the front there will be scattered showers and thunderstorms popping up from this afternoon through the evening overnight a low of 73 tomorrow cooler an occasional afternoon thunderstorm otherwise a mix of clouds and sun with a high in the mid 80s sunny tuesday with a high of 85